fix: workbench when getting workspaces

Author: giancarloromeo

services/web/server/src/simcore_service_webserver/projects/_projects_repository_legacy.py

@@ -394,9 +394,14 @@ def _create_private_workspace_query(
                 .group_by(project_to_groups.c.project_uuid)
             ).subquery("my_access_rights_subquery")
 
+            workbench_subquery = make_workbench_subquery()
+
             private_workspace_query = (
                 sa.select(
                     *PROJECT_DB_COLS,
+                    sa.func.coalesce(
+                        workbench_subquery.c.workbench, sa.text("'{}'::json")
+                    ).label("workbench"),
                     projects_to_products.c.product_name,
                     projects_to_folders.c.folder_id,
                 )
@@ -411,6 +416,10 @@ def _create_private_workspace_query(
                         ),
                         isouter=True,
                     )
+                    .outerjoin(
+                        workbench_subquery,
+                        workbench_subquery.c.project_uuid == projects.c.uuid,
+                    )
                 )
                 .where(
                     (projects.c.workspace_id.is_(None))  # <-- Private workspace